Soft filamentary cushioning structures



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. lhe abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED FEBRUARY 24;, 1970 ha in r I Soft cushioning structures suitable for use as cushioning elements in chairs, mattress covers and the like are made from filamentary material composed of polyhedral-shaped closed cells defined by filmy walls of a synthetic polymer, having a density of 0.005 to 0.05 gm./cc., and containing within said cells impermeant inflatant at a partial pressure of at least 50 mm. Hg to provide a total internal pressure at least as great as atmospheric pressure. A batt of such filamentary material is treated with an adhesive to bond the filaments at their cross-over points. The filaments occupy from 10 to 40% of the volume of the structure; 19- 28% is preferred for mattress covers. The spaces between the filaments are not filled with adhesive, and the overall density of the cushioning structure is less than 0.016 gm./cc.

Feb. 24, 1970 c. R. BOHN T871,007

SOFT FILAMENTARY CUSHIONING STRUCTURES Original Filed June 23, 1966 3 Sheets-Sheet 3.

mam 6m INVENTOR CONRAD RATHMANN BOHN ATTORNEY c. R. BOHN T871,007

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